WO2011127623A1 - Procédé et dispositif permettant une multidiffusion mobile - Google Patents

Procédé et dispositif permettant une multidiffusion mobile Download PDF

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Publication number
WO2011127623A1
WO2011127623A1 PCT/CN2010/000480 CN2010000480W WO2011127623A1 WO 2011127623 A1 WO2011127623 A1 WO 2011127623A1 CN 2010000480 W CN2010000480 W CN 2010000480W WO 2011127623 A1 WO2011127623 A1 WO 2011127623A1
Authority
WO
WIPO (PCT)
Prior art keywords
multicast
access point
mobile terminal
target access
service
Prior art date
Application number
PCT/CN2010/000480
Other languages
English (en)
Chinese (zh)
Inventor
郑军
宾梵翔
姚春燕
Original Assignee
上海贝尔股份有限公司
阿尔卡特朗讯
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海贝尔股份有限公司, 阿尔卡特朗讯 filed Critical 上海贝尔股份有限公司
Priority to CN201080064371.6A priority Critical patent/CN102792709B/zh
Priority to PCT/CN2010/000480 priority patent/WO2011127623A1/fr
Priority to TW100111634A priority patent/TWI501668B/zh
Publication of WO2011127623A1 publication Critical patent/WO2011127623A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
    • H04N21/4363—Adapting the video or multiplex stream to a specific local network, e.g. a IEEE 1394 or Bluetooth® network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast
    • H04L12/189—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast in combination with wireless systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/64—Addressing
    • H04N21/6405—Multicasting

Definitions

  • the present invention relates to the field of multicasting, and in particular to a method and apparatus for mobile multicast. Background technique
  • WiFi networks have developed rapidly. Especially in China, for example, telecom operators are planning or have built a large number of WiFi hotspots and hotspots in many cities, providing a certain degree of WiFi coverage and providing network access services to WiFi subscribers. For Chinese telecom operators, building a large-scale WiFi/WLAN network has become a basic strategy for them. After the network infrastructure is built, the next step is to provide users with a wide variety of value-added services on these large-scale WiFi/WLAN networks to attract more WiFi users.
  • Multicast is the basic mechanism for implementing IPTV. However, from the beginning of design, multicast does not consider support for user mobility. When multicast-based IPTV services are delivered to mobile users' WiFi devices, there are a number of problems.
  • a mobile multicast solution must be designed for WiFi networks, especially for operators' WiFi networks, especially considering the existing IEEE 802.11 mobile support mechanism.
  • IEEE 802.1 k and IEEE 802.11f are two mechanisms that support mobile terminal (MS) mobility switching between WiFi access points.
  • MS mobile terminal
  • IEEE 802.11r and IEEE 802.11f do not support mobile multicast, which hinders the actual deployment of these IEEE 802.11 protocols.
  • Embodiments of the present invention propose a method and apparatus for mobile multicast to support mobile multicast services in a wireless local area network.
  • a method for mobile multicast comprising: receiving a request for re-association by a mobile terminal; using a multicast service at the mobile terminal, and providing a service for the mobile terminal
  • the current access point and the target access point to which the mobile terminal is to be re-associated are in the same robust secure network association network, generate multicast as an information packet describing the multicast service of the mobile terminal a context information block; and transmitting the multicast context information block to the target access point to enable multicast service of the mobile terminal to switch to the target access point.
  • a method for mobile multicast comprising: receiving a multicast context information block from a current access point that is providing a service for the mobile terminal, the multicast context information block being Determining, by the mobile terminal, the information packet of the multicast service; determining, according to the extracted information, whether a multicast group in which the mobile terminal is located exists, and if not, sending an Internet Group Management Protocol (IGMP) join message to the multicast proxy And performing a multicast operation according to the feedback result of the multicast proxy to switch the multicast service of the mobile terminal to the target access point.
  • IGMP Internet Group Management Protocol
  • a method for joining a multicast group including: receiving an IGMP join message from a target access point to which the mobile terminal is to be re-associated; according to the IGMP join message, Creating, by the target access point, the multicast group in which the mobile terminal is located, and feeding back a creation result to the target access point, so that the target access point can switch the multicast service of the mobile terminal to the target Access Point.
  • a multicast context transmission method including: generating an information packet describing a multicast service being provided for a mobile terminal; transmitting the information packet to the multicast providing Other access points than the access point of the service, such that the multicast service can be seamlessly provided by the other access points.
  • an access point including: an access point transceiver unit, configured to receive a request for re-association by a mobile terminal; and an association determining unit: configured to determine whether the mobile terminal is using a group Broadcast service and whether the current access point serving the mobile terminal and the target access point to which the mobile terminal is to be re-associated are within the same robust secure network association network; and the multicast context block generation unit And, in a case that the determination result is yes, generating a multicast context information block as an information packet describing the multicast service of the mobile terminal, and connecting to the target by using the access point transceiver unit The ingress point sends the multicast context information block to enable switching the multicast service of the mobile terminal to the target access point.
  • an access point including: an access point transceiver unit, configured to receive a multicast context information block from a current access point that is providing a service for the mobile terminal,
  • the multicast context information block is an information packet describing the multicast service of the mobile terminal, and the information extracting unit is configured to extract information related to the multicast service from the multicast context information block, and according to the extracted information.
  • IGMP Internet Group Management Protocol
  • a multicast proxy including: a proxy transceiver unit, configured to receive an IGMP join message from a target access point to which the mobile terminal is to be re-associated; a multicast creation unit, configured to Generating an IGMP join message, creating a multicast group in which the mobile terminal is located for the target access point, and feeding back a creation result to the target access point, so that the target access point can The multicast service switches to the target access point.
  • a system for mobile multicast including the above two access points, the above-described multicast proxy, and a mobile terminal.
  • mobile multicast services can be supported in a wireless local area network, and in particular, switching of mobile multicast services through the IEEE 802.1 1r and IEEE 802.11f communication protocols is made possible.
  • FIG. 1 shows a schematic diagram of a system for mobile multicast in accordance with an embodiment of the present invention
  • FIG. 2 is a block diagram showing the structure of an access point device according to an embodiment of the present invention.
  • FIG. 3 shows a flow chart of a mobile multicast method in accordance with an embodiment of the present invention. Specific embodiment
  • IEEE 802.11r and 802.11f are two protocols that enable WiFi/WLAN users to move and switch quickly.
  • current 802.11 and 802.11f do not support mobile multicast, which hinders the actual deployment of the IEEE 802.11 protocol.
  • An exemplary description will be made below for the IEEE 802.11 protocol.
  • the following technical solutions can also be applied to other protocols, such as the Wireless Access Point Control and Configuration (CAPWAP) protocol.
  • CAPWAP Wireless Access Point Control and Configuration
  • FIG. 1 is only a schematic system diagram for explaining an embodiment of the present invention.
  • APs access point devices
  • MS mobile terminal
  • FIG. 1 is only a schematic system diagram for explaining an embodiment of the present invention.
  • the API is the current AP that is serving the MS
  • AP2 is the target AP to which the MS will re-associate.
  • the AP includes an AP transceiver unit 210 for receiving a request for re-association by the MS.
  • the association determining unit 220 is configured to determine whether the MS that requests the re-association is using the multicast service and whether the current AP and the target AP are in the same Robust Security Network Association (RSNA) network.
  • the MCB generating unit 230 is configured to generate a multicast context block (MCB) when the determination result of the association determining unit is yes.
  • the MCB is for the MS.
  • the multicast service used to describe the information grouping.
  • the AP further includes an information extracting unit 240, configured to extract information related to the multicast service (ie, IPTV/multicast information in the MCB) from the MCB if the AP is the target AP to which the MS is to be re-associated. And detecting, according to the information, whether the AP has the multicast group in which the MS is located. If not, sending, by the AP transceiver unit 210, an IGMP join message to the multicast proxy of the network, to join the MS included in the MCB. The multicast group where it is located.
  • information related to the multicast service ie, IPTV/multicast information in the MCB
  • the AP further includes a multicast operation unit 250, configured to perform a multicast operation, for example, joining a multicast group where the MS is located.
  • the AP further includes an associated operation unit 260, configured to re-associate the MS with the AP in the case that the AP is a target AP to which the MS is to be re-associated, so that the AP is provided with a multicast service through the AP.
  • an associated operation unit 260 configured to re-associate the MS with the AP in the case that the AP is a target AP to which the MS is to be re-associated, so that the AP is provided with a multicast service through the AP.
  • a multicast proxy is also provided.
  • the multicast proxy includes a proxy transceiver unit 310 for receiving a message (e.g., an IGMP multicast join message) sent by a target AP to which the MS is to re-associate.
  • the multicast creation unit 320 is configured to add the MS to the multicast group in advance according to the received message, that is, create a multicast group where the MS is located for the target AP.
  • each of the components shown in FIGS. 2 and 3 can be implemented by a plurality of devices in practical applications, showing many The components can also be integrated in a single chip or a device in practical applications.
  • the AP and multicast proxy can include any unit and device for other purposes.
  • the AP is the current AP that is providing services for the MS, It is the association judgment unit 220 and the MCB generation unit 230, and if the AP is the target AP, the information extraction unit 240, the multicast operation unit 250, and the associated operation unit 260 are used, and therefore, different devices may include only those that need to be used. Component.
  • FIG. 4 is a flow chart of a mobile multicast method according to an embodiment of the present invention.
  • the AP transceiving unit 210 of the API receives a request for reassociation from the MS.
  • the association determination unit 220 of the API determines: 1 whether the MS is currently using the multicast service and whether the 2 API and the target AP2 (ie, the target AP to which the MS is to be re-associated) are within the same RSNA network.
  • the judgment 1 of step 420 means that if a handover occurs in the future, for example, when the MS switches from the API to the AP2, the IPTV/multicast service of the MS also switches seamlessly from the API to the AP2.
  • step 480 If one of the above two judgments does not hold, the flow proceeds to step 480 to directly re-associate the MS to AP2.
  • step 430 the MCB generating unit 230 in the API generates an MCB and transmits it to the AP 2 through the AP transceiver unit 210.
  • the MCB can be defined to describe and include multicast information of the MS.
  • An example of defining an MCB is shown below:
  • the MCB includes the MAC address of the MS, the IP address of the join multicast group, the QoS parameters of the IPTV channel, and the like.
  • the size and content of the MCB are not fixed. In other examples, the MCB can be dynamically extended according to actual needs to include more multicast information and/or IPTV parameters.
  • the content of the MCB only includes the MAC address of the MS, this means that the MS does not use any IPTV/multicast, so such MCB is invalid.
  • step 440 the AP transceiver unit 210 of the AP2 receives the MCB sent by the API, and the information extraction unit 240 extracts the information related to the multicast service (SP, IPTV/multicast information) from the MCB. .
  • SP multicast service
  • step 450 the information extracting unit 240 of the AP2 detects, according to the information, whether the AP2 has the multicast group in which the MS is located. If it does not exist, in step 400, a standard IGMP join message is sent to the multicast proxy of the network by the transceiver unit 210 to join the multicast group in which the MS included in the MCB is located.
  • the multicast creation unit 320 in the multicast proxy creates a multicast group in which the MS is located for the target AP (ie, AP2), and feeds back the result to AP2.
  • the multicast group creation can be performed according to the multicast group creation process in the specific protocol, and will not be further elaborated here.
  • the multicast operation unit 250 in the AP2 performs a multicast operation according to the feedback result from the multicast proxy, where the multicast operation includes a regular multicast operation such as joining a multicast group, registration, and the like.
  • the feedback here can be a standard message in a multicast business process.
  • step 480 the associated operating unit 260 in AP2 re-associates the MS from the API to the AP2, so that the IPTV/multicast service can continue to be provided to the MS through the AP2.
  • the mobile multicast method of the present invention is described below by taking IEEE 802.1 lr and IEEE 802.1 If as an example.
  • Example one
  • an MCB can be created in a Resource Information Memory (RIC) embedded in an IEEE 802.11 message.
  • a specific method may be to extend the RIC to carry the MCB delivered by the resource request message.
  • IEEE 802.11 RSNA resource requests and resource responses are exchanged after pairwise temporary keys (PTKs) are established, and resource requests and resource responses are protected by message integrity checks to ensure MCB security.
  • PTKs pairwise temporary keys
  • the IEEE 802.11r frame structure after MCB extension is as follows:
  • a multicast context information block can be created in the IEEE 802.1 If IAPP-MOVE message.
  • the Access Point Internal Protocol (IAPP) supports the delivery of MS content information between peer APs.
  • IAPP Access Point Internal Protocol
  • Two IAPP messages (IAPP MOVE-notify and IAPP-MOVE.indicatkm ) can carry content information and can carry the MCB in the extended content block of the MOVE-response packet.
  • the MCB In the IAPP MOVE-response packet indicating the current multicast service of the MS, the MCB must be visible.
  • API multicast operation unit when receiving IAPP MOVE-notify and IAPP-MOVE.indication
  • the API After receiving the service primitive, the API will refer to forwarding all relevant content of the re-associated MS to the peer IAPP entity of AP2 (after the handover is completed), where AP2 is sent by sending IAPP MOVE
  • the -response packet is associated with the MS, and after the response occurs, the API may discard any multicast content for the MS identified by the MAC address parameter.
  • the techniques provided by embodiments of the present invention are not only applicable to IEEE 802.1 lr/f, but also to other systems that implement mobile multicast, for example, when using wireless access point control and configuration (CAPWAP).
  • CAPWAP wireless access point control and configuration
  • the access controller (AC) only needs to provide the same components as the components used by the AP in the above technical solution, and the implementation of the present invention can be implemented by using a message similar to that used in the above technical solution.
  • the technical solution disclosed by the example is not only applicable to IEEE 802.1 lr/f, but also to other systems that implement mobile multicast, for example, when using wireless access point control and configuration (CAPWAP).
  • the access controller (AC) only needs to provide the same components as the components used by the AP in the above technical solution, and the implementation of the present invention can be implemented by using a message similar to that used in the above technical solution.
  • the technical solution disclosed by the example is not only applicable to IEEE 802.1 lr/f, but also to other systems that implement mobile multicast
  • some embodiments also include a program storage device (eg, number) that is machine readable or computer readable. Word data storage medium) and encoding machine executable or computer executable program instructions, wherein the instructions perform some or all of the steps of the above methods.
  • the program storage device can be a digital memory, a magnetic storage medium (such as a magnetic disk and magnetic tape), a hardware or an optically readable digital data storage medium.
  • Embodiments also include a programming computer that performs the steps of the above method.

Abstract

La présente invention fournit un procédé et un dispositif permettant une multidiffusion mobile. Le procédé inclut les étapes suivantes consistant à : recevoir une requête de réassociation à partir d'une station mobile (MS) ; générer un bloc de contexte de multidiffusion (MCB) comme paquet informationnel qui décrit le service de multidiffusion de la MS, lorsque la MS utilise le service de multidiffusion et un point d'accès courant qui fournit un service pour la MS et un point d'accès cible auquel la MS se réassociera sont dans le même réseau d'Association de réseau de sécurité robuste (RSNA) ; et envoyer le MCB au point d'accès cible afin que le service de multidiffusion de la MS puisse être commuté vers le point d'accès cible. Avec la solution technique fournie par un mode de réalisation de la présente invention, un réseau local sans fil peut prendre en charge le service de multidiffusion mobile.
PCT/CN2010/000480 2010-04-12 2010-04-12 Procédé et dispositif permettant une multidiffusion mobile WO2011127623A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201080064371.6A CN102792709B (zh) 2010-04-12 2010-04-12 用于移动组播的方法及其设备
PCT/CN2010/000480 WO2011127623A1 (fr) 2010-04-12 2010-04-12 Procédé et dispositif permettant une multidiffusion mobile
TW100111634A TWI501668B (zh) 2010-04-12 2011-04-01 A method for mobile multicast and a device thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2010/000480 WO2011127623A1 (fr) 2010-04-12 2010-04-12 Procédé et dispositif permettant une multidiffusion mobile

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WO2011127623A1 true WO2011127623A1 (fr) 2011-10-20

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CN (1) CN102792709B (fr)
TW (1) TWI501668B (fr)
WO (1) WO2011127623A1 (fr)

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CN1983945A (zh) * 2006-06-19 2007-06-20 华为技术有限公司 一种多播服务实现方法
CN101568069A (zh) * 2008-04-25 2009-10-28 上海贝尔阿尔卡特股份有限公司 为外来移动终端提供组播业务的方法及装置

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CN102792709B (zh) 2015-09-16
TW201220881A (en) 2012-05-16
CN102792709A (zh) 2012-11-21
TWI501668B (zh) 2015-09-21

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